资深期货专家景川向南方周末记者分析，白银、铂金将跟随黄金走势，但波动幅度更大。此外，铜、铝等短期内受避险情绪和风险资产抛售影响，价格可能承压，但若冲突加剧导致供应中断，价格可能反弹。
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the reason is that we have only one “kind” of match, and marking the end of the position is always correct. with arbitrary lookarounds, instead of marking the match ended here, you would have to mark the match for lookaround #7 ended here, and the match for lookaround #3 ended 5 characters ago, and the match for lookaround #12 ended 100 characters ago. i had a lot of temptation to support arbitrary lookarounds, and it really does seem like an easy fix at first glance, but the complexities arise much later in the match loop, and this is a good example of how some theory just does not hold up when you implement it. as a side note, we can actually loosen this restriction on R3 (above) which is still work in progress, but not R1, because R1 is the one that determines the start position of the match.
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